, instead of being attenuated into a diametric line or band, are in this case curved to form a loose spiral. Between them is the figure of a body and the three tail-feathers, while the triangular extensions which generally indicate the posterior of the body are simply two rounded knobs at the point of union of the wings and tail. There is no indication of a head. The modifications in the figure of the bird shown in the last mentioned pictograph, and the highly conventionalized forms which the wings and other parts assume, give me confidence to venture an interpretation of a strange figure shown in plate CXLI, _a_. This picture I regard as a representation of a bird, and I do so for the following resemblances to figures already studied. The head of the bird, as has been shown, is often replac